What B2D (Business-to-Distributor) is

An acronym that describes online communications and transactions conducted between a business and the members of its distribution channel (such as resellers, distributors, agents, and retailers).

The meaning of B2C (Business-to-Consumer)

An acronym that describes the thousands of e-commerce Web sites which sell products directly to the public (the consumer market). B2C is different from the B2B sector, and this distinction is important when comparing Web sites. Each approach has its own business model, strategy, execution, and fulfillment. NetLingo.com has a B2C component that includes selling books (including NetLingo: The Internet Dictionary) and smiley merchandise.